Feeding mechanism



Dec. 28 1926.

E. G. GARTIN FEEDING MECHANISM Filed Dec. 22, 1922 object of my invention is to provide an im- Patented Dec. 28, 1926 UNITED STATES PAT ENT OFFICE.

ELMElRi G. GARTIN, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SUILLIVAN MA- CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

FEEDING MECHANISM.

Application filed December 22, 19 22. Serial No. 608,455.

My invention relates to feeding mechanisms, and more particularly to feeding mechanisms for rock drilling motors.

1 An object of my invention is to provide an improved feeding mechanism. Another proved and very compact feeding mechanism for rocking drilling. motors. A further object of my inventiolr is to provide an improved fluid operated feeding mechanism for rock drilling motors in which the over-all length may be materially dimin ished while obtaining relatively long feed. ()therobjects and advantages of my invention will hereinafter more fully appear.

In'the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,

Fig. 1 is a view partially in elevation, but mainly in central longitudinal vertical section with parts broken away, illustrating one embodiment which my-invention -may assume in practice, J

Fig. 2 is atransverse vertical section on the line 2-2 of Fig. 1.

In the form of my invention, which I have selected for purposes of illustration I have shown the same in combination With a per-- cussive drilling'motor 1, which motor is adapted to actuate a drill steel 2 and is provided with improved feeding mechanism hereinafter described.

The motorl is provided with lateral gibs 3, the opposite sides of which gibs are guided in ways 4 formed in a shell 5. Extending longitudinally of the shell and journaled in bearings 6 and 7 respectively at the opposite ends thereof, is a rotatable threaded shaft 8 'whichmay be drive by a gear -9 and with this threaded shaft or I screw a nut 10, suitably fixed to the motor 1,

cooperates. Suitably attached to the shell 5 and herein formed integrally therewith is a cylinder member 12 in whose bore 13 a piston lat provided with suitablepackings '15 and. 16 'is reciprocable. For the purpose of pre-' venting rotation of the piston during its reciprocation, various meansmayb'e employed, but herein, with a view to simplicity of illustration, I have showna key member 17 carried by the piston 14 and cooperating with a longitudinal straight slot 18 cut in the wall of-the cylinder bore 13. The piston member 14 is internally threaded as indicated at 20 and these threads fit and cooperate with the threads upon a screw 21 which is journaled at its opposite ends in suitable bearings 22 and 23 formed in the opposite heads of the feeding mechanism. Fluid pressure may be alternatively supplied to 0pposite sides of the piston 14 by way of ports 24 and 25. A -suitable valve 26 having a supply port 27 and an exhaust groove- 28 which is arranged to communicate with 'a vent port 29 serves to supply and exhaust fluid in such manner as to cause opposite movements ofWhe piston member 14. A pinion 30 is secured in non-rotative relation to the screw .21. It will be observed that the pinion 30 is larger than the gear 9.

As a result, a given number of,revolutions is taken ofthis fact by making the lead of a the screw 21 materially greater than that of the screw 8 whereby the movements of the piston 14 will least be hindered by fric-' tion of the threads of the screw 21, and the reaction, during drillingyof the motor 1 upon the screw 8 tending to rotate the same, thereby diminshed. It will be noted, moreover, that the maximum possible feed of the motor 1 is less than the maximum possible .travel of the piston 14 and this permits a further variation in the leads of the screws;

From the foregoing description the mode of operation of my invention will be very clearly apparent. Assuming the valve 26 to be in the position indicated, it will be observed that fluid pressure is passed through the passage 24 to act upon the rear end of move forward in its cylinder 12'and will, reason of the factthat it cannot itself rotate,

causerotation of the screw 21 and so of the pinion 30. The pinion 30 will in turn rotate the gear 9 and so efi'ect rotation ofthe screw 8. The latter will cooperate with the nut 10. to cause longitudinal feeding 'movement too ofthe motor 1. When it is desired to reverse the feed, the port 27 may be brought opposite the passage 25 and the groove 28 caused to communicate withthe passage '24:.- The piston; will then. move in the opposite direction, the screw 21 will rotate in an opposite direction and the screw 8 will rotate in an opposite direction. v

While I have in this application specifically described one form which my invention may assume in practice, it will be understood thattliis form of the same is shown for purposes of illustration and that the invention may be modified and embodied in other forms without departing from its spirit or the scope of'the appended claims.

i l hat I claim as new andv desire to secure by Letters Patent is 1. The combination wlth' a drilling motor,

, retraction of said drilling motor.

2. The combination with a drilling motor, of'feeding means therefor including a rotatable screw, a piston operativcly connected to said screw, a cylinder containing said piston,

means for effecting relative motion between said screw and piston to effect movement of the former, and means for transforming the motion of said screw to a feeding motion and transmitting said feeding motion to said motor whereby continuous, relative motion in one direction between said piston and screw effects forward feeding movement of said drilling motor while the opposite continuous relative movement efiects retraction of said drlllm motor.

.3. The combination witha drilling motor,

of feeding means therefor including a' screw,

a reciprocable piston operatively connected to said screw, a cylinder containing said piston, means for effecting relative motion between said screw and piston to produce a -movement of one of the same, and 'means for transforming said movement to a feeding motion and transmitting said feeding motion to said motor including a feed screw and a cooperating feed nut whereby continu ous relative movement in either direction between said first mentioned screw and piston effects corresponding feeding movement of saidmotor. I5

4. The combination with a drilling motor, of feeding means therefor including a screw, a reciprocable piston operatively connected to said screw, a cylinder containing said iston, means for effecting relative motion tweensaid screw and piston to produce a movement of one of the same, and means for transforming said movement ,to a feeding motion and transmitting said feeding motion to said motor including a feed screw, 1. cooperating feed nut, and gearing connectemme ing said first mentioned screw with said feed I screw whereby continuous relative movement v1n either direction between said first mentioned screw and said piston efiects correspending feeding movement of said motor.

5. The combination with a drilling motor, of feeding means therefor including a screw member, a member cooperating therewith, means for eifectinfg relative motion between said members to effect movement of one of the same, and means for transforming said movement to a feeding motion and transmitting said feeding motion to said motor including a feed screw and a cooperating feed nut whereby continuous relative movement in either direction between said members effects corresponding feeding movement of said motor.

v 6 The combination with a drilling motor, of feeding means therefor including a screw, a reeiprocable piston operatively connected to said screw, a cylinder containing said piston, means for efi'ectil'ig relative motion be-- tween said screw'and'pi'ston to effect movement of one of-the same, and means for transforming said movement to a feeding movement "and transmitting said feeding movement to said motor. including a nonrota-table feed nut carried by said motor, a rotatable feed screw cooperating therewith,

and means operatiyelyiconnecting said feed screw with said'first mentioned screw whereby contlnuous relative movement in either direction between said first mentioned screw and piston effects corresponding feeding movement of said motor.-

7. The combination with a drilling motor and means for supporting said motor for feeding movement of a predetermined length, of feeding means for said motor including a screw, a reciprocable piston operatively connected to said screw, acylinder containing said piston, means foreifecting movement of said piston longitudinally of said screw to effect rotary motion of the latter, and means for transforming said rotary motion to a feeding motion and transmitting said feeding motion'to said motor including means operatively connecting said screw and said motor whereby continuous relative movenot ment in either direction between said screw 'mitting saidfeeding motion to said motor including means operatively connecting said screw to said motor whereby continuous rela-i.

" tive movement in either direction between said screw and piston effects corresponding feeding movement of said motor.

9. The combination with a drilling motor, of feeding means therefor including a screw member, a nut member operatively connected to said screw member, means for moving one of said members to effect motion of the other comprising a feed cylinder and a cooperating feed -piston, and means for transforming said motion to a feeding motion and transmitting said feeding motion to said drilling motor whereby continuous relative movement in either direction between said cylinder and piston effects corresponding feeding,

movement of said drilling motor.

10. The combination with a drilling motor, of feeding means therefor comprising a feed cylinder, a reciprocable piston contained therein, means for effecting relative motion between said cylinder and piston, and means deriving motion from such relative motion for transmitting a feeding motion to said drilling motor at a rate different from the rate of relative motion aforesaid whereby continuous relative movement in one direction between said cylinder and piston effects for'ward feeding movement of said motor while the opposite continuous relative movement effects retraction of said drilling motor.

11. The combination with a drilling motor, of feeding means therefor comprisin a feeding motor having relatively fixed an movable parts of which the latter moves relative to the former in a direction parallel to the direction of feed and at a different rate from the rate of feed, means for effecting relative motion between said feeding motor parts, and means deriving motion from said relative motion and transforming the derived motion to a feeding motion and trans mitting said feeding motion to said drilling motor whereby continuous relative movement in either direction between said feeding motor parts effects corresponding feeding movement of said drilling motor.

12.The combination with a drilling motor, of feeding means therefor including a plurality of cooperating parallel feed screws, a reciprocable member cooperating with one of said screws, means for effecting relative movement between said reciprocable member and its cooperating screw to effect rotary motion of the latter, and means comprising means for transmitting rotary motion therefrom to the other screw and a nut operatively connected to the said other screw' and carried by said motor for'transformingsaid rotary motion to a feeding motion and transmitting said feeding motion-to said motor whereby continuous relative movement in either direction between said reciprocable -member and its cooperating screw effects corresponding feeding movement of said motor.

13. The combination with a drilling motor, of feeding means therefor comprising a rotatable feeding screw, means for rotating said screw including a motor having relatively'movablemembers one of which is reciprocabl'e in a path parallel to the direction of feed, and means for transforming the rotary motion of said screw to a feeding motion and transmitting said feeding mo-' tion to said motor whereby continuous relative movement in either direction between said members effects corresponding feeding movement of said motor.

14, The combination with a drilling motor, of feeding means "therefor including a screw, a nut operatively connected to said screw, means for effecting relativerotarysaid motor.

15. The combination with a drilling, mo tor, of feeding means therefor comprisin a plurality of cooperating relatively parallel shafts, a member cooperating with one of said shafts and movable longitudinally thereof, means for effecting rotary motion between said member and its cooperating shaft, and means for transmitting the rotary motion to the other shaft and transforming the rotary motion of the latter to feeding motion and transmitting said feeding motion to said motor whereby continuous relative movement in either direction between said memberand its cooperatmovement of said motor.

16. The combin tionwith a drilling mo-' tor, of feeding means therefor comprising a rotatable shaft, a piston cooperating with said shaft and movable longitudinally thereof, a cylinder. containing said piston and within which said-last mentioned shaft is supported, means for admitting pressure fluid to said cylinder to effect relative motion between said piston and said last mentioned shaft to produce a movement of one of the same, and means including a rotatable v shaft parallel with said first mentioned shaft and-rotatable relative thereto for transforming said movement to a feeding mot1on and transmitting said feeding motion ,to said rotatable c ting shaft effectscorresponding feeding motor whereby continuous relative movement in either directionbetween said piston and its cooperating shaft effects corresponding feeding movement of said motor. W

17. The combination with a drilling motor and guiding means therefor, of feeding means for said motor including a screw, a

reciprocable feed piston cooperating there-c with, a feed cylinder carried by said 'guich ing means and containing said piston, a sec- 0nd screw arranged parallel with said first mentioned screw and operatively connected to the latter, means for effecting relative motion between saidfeed piston and said.

screw effects corresponding feeding movement of said motor. V

18. The combination with-a drilling motor and guiding means therefor, of feeding means for said motor comprising a cylinder carried by said guiding means, a reciprocable piston disposed in said cylinder and held against rotatable movement relative thereto, a rotatable screw arranged coaxially within said cylinder and journaled on said guiding means and with which said-piston cooperates, means whereby ressure fluid may be admitted to said cylinder to effect longitudinal movement of said piston relative to said screw to effect rotary motion of the latter, and means for transforming said rotary -motion to a feeding motion and transmitting said feeding motion to said motor including a second rotatable screw arranged parallel with said first mentioned screw and journaled on said guiding means,v

a nut carried by said drilling motor with which said second mentioned screw coopcrates, and means for operatively connecting said first mentloned screw with said second mentioned screw, whereby a continuous relative movement in either direction between said pistonand said first mentioned screw efi'ects corresponding feeding movement of said motor.

' In testimony whereof I aflix my signature.

ELMER o. GARTIN. 

